Toothbrush



FIG. 1 is a front perspective view from above and one side;

FIG. 2 is a front view;

FIG. 3 is a rear view;

FIG. 4 is a view from the other side;

FIG. 5 is a plan view; and,

FIG. 6 is an underneath plan view. 

We claim the ornamental design for a toothbrush, as shown and described. 